Finding the Third Proportional to 380,592 and 828,990

Step by Step Solution

1. Step 1: Write the proportion equation
   380,592 : 828,990 = 828,990 : x
2. Step 2: Convert to fraction form
   380,592/828,990 = 828,990/x
3. Step 3: Cross multiply
   380,592x = 828,990 × 828,990
4. Step 4: Simplify right side
   380,592x = 687,224,420,100
5. Step 5: Solve for x
   x = 687,224,420,100/380,592
6. Step 6: Final answer
   x = 1,805,672.27